I don't know if it is relevant or not,but in my last project,I have
virtualized FreeBSD 14 on top of Windows 11 and as a graphic driver I've
used the package "xf86-video-vmware". This driver should exist even on
Linux and should support 3D acceleration.

https://www.reddit.com/r/freebsd/comments/1c71mjn/comment/l04yq13/

On Sat, Apr 20, 2024 at 12:20 PM Adrian Zaugg <devuan.org@???>
wrote:

> I could still use some tipps on graphic acceleration for Windows guests
> running under KVM/QEMU. Do you get 3D-Acceleration without GPU-passthrough
> and
> how?
>
> Thank you for your answer!
>
> Best regards, Adrian.
>
> In der Nachricht vom Tuesday, 2 April 2024 13:13:52 CEST schrieb Adrian
> Zaugg:
> > Hi
> >
> > For the youngest member of the BSOD-Family of operating systems some of
> the
> > prerequisites are "DirectX" and "WDDM2". This can be achieved under
> KVM/QEMU
> > with the QXL driver and a Display of type Spice. On huge Displays (38",
> 4K)
> > this driver does not perform so well. I am not asking for any
> pass-through
> > configuration since the VM screen should be in a window on top of Linux
> X11
> > and there is no spare GPU around.
> >
> > Using the VirtIO Video driver instead, performance is much better, but
> there
> > is no WDDM2 support without OpenGL switched on. Trying to switch on
> OpenGL
> > yields in different results in Daedalus, Chimaera and on different
> > hardware. I use virt-manager from libvirt for configuration, so the terms
> > Video and Display refer to the respective configuration options. The
> latest
> > guest additions and VirtIO drivers are installed in the guest btw.
> >
> > On my Tiger Lake Laptop under Chimaera with Intel XE graphics for
> example I
> > can switch on OpenGL under Display and use it together with Video VirtIO
> and
> > 3D acceleration switched on. It just gets terribly slow. Without OpenGL
> > switched on, it is fast but there is no "WDDM2" support.
> >
> > On a AMD Ryzen 5700G under Daedalus there are errors from Apparmor
> switching
> > on OpenGL. Adding an Apparmor profile to allow the needed path, these
> > errors go away, but then the VM process dies during start-up of the vm
> > (before booting the guest). There is no further error seen in syslog.
> >
> > If there is no discrete GPU for the VM and 3D and OpenGL is switched on
> with
> > VirtIO, does it use libvirglrenderer1 which in turn means that graphics
> get
> > rendered on the CPU? Is this the reason why performance is so slow?
> >
> > What do you do to get good video performance, 3D acceleration and comply
> > with the requirements for the latest BSOD-Family-OS? Do you connect your
> > Display through RDP, Spice or VNC?
> >
> > Thank you for answers.
> >
> > Best regards, Adrian.
>
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--
Mario.